[hidden]{display:none!important}
html,body{margin:0}
img{max-width:100%}
/* Layout: bright corporate site. White and pale steel grounds, steel blue type, copper for action, illustrated field scenes as imagery. Single light look by choice. */
:root{
  color-scheme:light;
  --bg:#FFFFFF; --tint:#F1F5F7; --tint-2:#E4ECF0; --ink:#16252F; --muted:#5A6873; --line:#D9E1E5;
  --steel:#1F3A4D; --steel-2:#2C5068; --copper:#B5652C; --copper-dark:#94501F; --copper-soft:#F6EAE0; --cuso4:#1F6E8C;
  --on-steel:#EEF3F6; --on-steel-muted:#AFC0CB;
  --display:"IBM Plex Sans Condensed","Arial Narrow",Arial,sans-serif;
  --body:"IBM Plex Sans",Calibri,"Segoe UI",Arial,sans-serif;
  --mono:"IBM Plex Mono",Consolas,"Courier New",monospace;
}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font:400 16px/1.6 var(--body)}
h1,h2,h3{font-family:var(--display);line-height:1.1;margin:0;text-wrap:balance;color:var(--steel)}
p{margin:0}
a{color:inherit}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--copper);outline-offset:2px}
.wrap{max-width:1180px;margin:0 auto;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px))}
.eyebrow{font:600 12px/1 var(--body);letter-spacing:.16em;text-transform:uppercase;color:var(--copper)}
section{padding-block:80px}
.sec-head{display:grid;gap:12px;margin-bottom:40px;max-width:700px}
.sec-head.center{margin-inline:auto;text-align:center}
.sec-head h2{font-size:clamp(30px,4vw,42px);font-weight:700}
.sec-head p{color:var(--muted);font-size:17px}
.btn{display:inline-block;padding:14px 22px;font:600 15px/1 var(--body);text-decoration:none;border-radius:3px;border:2px solid transparent;transition:background .15s}
.btn.primary{background:var(--copper);color:#fff}
.btn.primary:hover{background:var(--copper-dark)}
.btn.outline{border-color:var(--steel);color:var(--steel);background:#fff}
.btn.outline:hover{background:var(--tint)}

/* top bar + header */
.topbar{background:var(--steel);color:var(--on-steel-muted);font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;padding-block:8px}
.topbar b{color:var(--on-steel);font-weight:500}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:10;background:#fff}
header{position:sticky;top:env(safe-area-inset-top,0px);z-index:9;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 2px 10px rgba(22,37,47,.05)}
header .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-block:14px}
.logo{display:block;width:180px;height:auto;color:var(--steel)}
nav{display:flex;gap:22px;font:600 15px/1 var(--body)}
nav a{text-decoration:none;color:var(--ink)}
nav a:hover{color:var(--copper)}
@media (max-width:820px){nav{display:none}.logo{width:150px}.topbar .hide-sm{display:none}}

/* hero */
.hero{position:relative;min-height:470px;display:flex;align-items:center;overflow:hidden;background:#0E2431;color:#fff;padding:0}
.hero-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;max-width:none}
.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,36,54,.95) 0%,rgba(10,36,54,.76) 42%,rgba(10,36,54,.08) 100%)}
.hero-img{object-position:65% 45%}
.hero-copy{max-width:600px;display:grid;gap:18px}
.hero .eyebrow{color:#F0A06C}
.hero h1{font-size:clamp(40px,5.4vw,64px);font-weight:700;color:#fff;letter-spacing:-.01em}
.hero h1 span{color:#ED9B63}
.hero-copy > p:not(.eyebrow){color:#E3ECF1;font-size:18px;max-width:54ch}
.btn.ghost{border-color:#fff;color:#fff;background:transparent}
.btn.ghost:hover{background:rgba(255,255,255,.1)}





.hero .wrap{position:relative;width:100%;padding-block:72px}
@media (max-width:700px){.hero{min-height:0}.hero-shade{background:rgba(10,36,54,.78)}}
.hero .actions{display:flex;gap:12px;flex-wrap:wrap}


/* credential strip */
.strip{background:var(--steel);color:var(--on-steel);padding-block:0}
.strip .wrap{display:grid;grid-template-columns:repeat(4,minmax(0,1fr))}
.strip .wrap > div{padding:22px 18px;border-right:1px solid var(--steel-2);display:flex;gap:12px;align-items:center}
.strip i{font-style:normal;font-size:24px;color:#E58A50;line-height:1}
.strip p{display:grid;gap:2px}
.strip .wrap > div:last-child{border-right:0}
.strip b{font:600 13px/1.2 var(--body);letter-spacing:.08em;text-transform:uppercase}
.strip span{font-size:13px;color:var(--on-steel-muted)}
@media (max-width:760px){.strip .wrap{grid-template-columns:repeat(2,minmax(0,1fr))}.strip .wrap > div:nth-child(2){border-right:0}.strip .wrap > div{border-bottom:1px solid var(--steel-2)}}

/* featured */
.featured{background:var(--tint)}
.feature-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.feature{background:#fff;border:1px solid var(--line);display:grid;grid-template-rows:auto 1fr;overflow:hidden;transition:box-shadow .2s,transform .2s}
.feature:hover{box-shadow:0 14px 34px rgba(22,37,47,.12);transform:translateY(-3px)}
.fimg{aspect-ratio:2/1;overflow:hidden;background:var(--tint);max-width:100%}
.fimg img{display:block;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.feature:hover .fimg img{transform:scale(1.03)}
.feature .body{padding:24px;display:grid;gap:10px;align-content:start}
.feature h3{font-size:21px;font-weight:600}
.feature p{color:var(--muted);font-size:15px}
.feature .more{font:600 14px/1 var(--body);color:var(--copper);text-decoration:none;margin-top:6px}
@media (max-width:1000px){.feature-grid{grid-template-columns:1fr 1fr}}
@media (max-width:620px){.feature-grid{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){.feature,.feature:hover,.fimg img,.feature:hover .fimg img{transition:none;transform:none}}

/* all services */
.services{background:#fff}
.services .svc{background:var(--tint)}
.svc-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
@media (max-width:1100px){.svc-list{grid-template-columns:repeat(3,minmax(0,1fr))}}
.svc{background:#fff;padding:24px;border-top:3px solid var(--cuso4);display:grid;gap:8px;align-content:start}
.svc h3{font-size:20px;font-weight:600}
.svc p{color:var(--muted);font-size:15px}
@media (max-width:900px){.svc-list{grid-template-columns:1fr 1fr}}
@media (max-width:620px){.svc-list{grid-template-columns:1fr}}

/* about */
.about2 .about-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;margin-bottom:40px}
.about-photo{max-width:100%}.about-photo img{display:block;width:100%;height:auto;aspect-ratio:3/2;object-fit:cover}
.about-copy{display:grid;gap:14px}
.about-copy h2{font-size:clamp(30px,4vw,42px);font-weight:700}
.about-copy > p:not(.eyebrow){color:var(--muted);font-size:17px}
.credential{border-left:4px solid var(--copper);background:var(--tint);padding:16px 20px;display:grid;gap:2px}
.credential b{color:var(--steel)}
.credential span{color:var(--muted);font-size:15px}
.about2 .purpose{display:grid;grid-template-columns:1.1fr 1fr;gap:40px;align-items:center}
@media (max-width:860px){.about2 .about-grid,.about2 .purpose{grid-template-columns:1fr}}
.about-old .wrap{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.about .block{display:grid;gap:16px}
.about h2{font-size:clamp(28px,3.6vw,38px);font-weight:700}
.about p{font-size:17px;color:var(--muted)}
.about p strong{color:var(--ink);font-weight:600}
.badge{display:flex;gap:18px;align-items:center;background:var(--copper-soft);padding:20px;border:1px solid #EBD3C0}
.badge b{font:700 54px/1 var(--display);color:var(--copper)}
.badge span{font-size:14px;color:var(--ink)}
.creds{display:flex;flex-wrap:wrap;gap:8px}
.creds span{font:500 13px/1 var(--body);padding:8px 12px;background:var(--tint);color:var(--steel);border-radius:2px}
.purpose{background:var(--steel);color:var(--on-steel);padding:36px;display:grid;gap:16px}
.purpose h2{color:#fff}
.purpose p{color:var(--on-steel-muted)}
.purpose ul{margin:0;padding:0;list-style:none;display:grid;gap:12px}
.purpose li{display:grid;grid-template-columns:22px 1fr;gap:10px;color:var(--on-steel)}
.purpose li::before{content:"";width:10px;height:10px;background:var(--copper);transform:rotate(45deg);margin-top:8px}
@media (max-width:860px){.about .wrap{grid-template-columns:1fr}}

/* experience */
.experience{background:var(--tint)}
.projects{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.proj{background:#fff;padding:22px 24px;display:grid;grid-template-columns:120px 1fr;gap:18px;min-width:0}
.proj .tag{font:600 12px/1.4 var(--body);color:var(--cuso4);text-transform:uppercase;letter-spacing:.08em;padding-top:3px}
.proj p{font-size:15px}
@media (max-width:760px){.projects{grid-template-columns:1fr}.proj{grid-template-columns:1fr;gap:6px}}

/* tank diagram */
.diagram .wrap{display:grid;grid-template-columns:1.25fr 1fr;gap:48px;align-items:center}
.diagram svg{width:100%;height:auto;max-width:100%;background:#fff;border:1px solid var(--line)}
.diagram .copy{display:grid;gap:16px}
.diagram .copy p{color:var(--muted);font-size:17px}
.diagram ol{margin:0;padding-left:20px;display:grid;gap:8px;color:var(--ink)}
@media (max-width:860px){.diagram .wrap{grid-template-columns:1fr}}

/* who + area */
.two{display:grid;grid-template-columns:1fr 1fr;gap:56px}
.list{list-style:none;padding:0;margin:0;display:grid;gap:18px}
.list li{display:grid;gap:2px;padding-left:16px;border-left:3px solid var(--copper)}
.list b{font-weight:600;color:var(--steel)}
.list span{color:var(--muted);font-size:15px}
.states{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.state{background:var(--tint);padding:20px;display:grid;gap:4px}
.state b{font:700 32px/1 var(--display);color:var(--steel)}
.state span{color:var(--muted);font-size:14px}
@media (max-width:760px){.two{grid-template-columns:1fr}}

/* calculators */
.calc-sec{background:var(--tint)}
.calc{display:grid;grid-template-columns:250px 1fr;background:#fff;border:1px solid var(--line);box-shadow:0 8px 30px rgba(22,37,47,.06)}
.tabs{display:flex;flex-direction:column;background:var(--steel)}
.tabs button{all:unset;cursor:pointer;padding:17px 20px;font:500 15px/1.3 var(--body);color:var(--on-steel-muted);border-bottom:1px solid var(--steel-2)}
.tabs button:hover{color:#fff}
.tabs button[aria-selected="true"]{color:#fff;background:var(--steel-2);box-shadow:inset 4px 0 0 var(--copper)}
.tabs button:focus-visible{outline:2px solid var(--copper);outline-offset:-2px}
.panel{padding:30px;display:grid;gap:22px;min-width:0}
.panel h3{font-size:24px;font-weight:600}
.formula{font:400 13px/1.5 var(--mono);color:var(--steel);background:var(--tint);padding:12px 14px;overflow-x:auto;white-space:nowrap;border-left:3px solid var(--cuso4)}
.fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px}
.fields label{display:grid;gap:6px;font-size:13px;font-weight:500;color:var(--muted)}
.fields input,.fields select{font:500 16px/1 var(--mono);padding:11px 12px;background:#fff;color:var(--ink);border:1px solid #C5D0D6;border-radius:3px;width:100%}
.results{display:flex;flex-wrap:wrap;gap:32px;border-top:1px solid var(--line);padding-top:20px}
.res{display:grid;gap:6px}
.res span{font-size:12px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}
.res b{font:500 32px/1 var(--mono);color:var(--copper);font-variant-numeric:tabular-nums}
.note{font-size:14px;color:var(--muted)}
@media (max-width:760px){.calc{grid-template-columns:1fr}.tabs{flex-direction:row;overflow-x:auto}.tabs button{white-space:nowrap;border-bottom:0;border-right:1px solid var(--steel-2)}.tabs button[aria-selected="true"]{box-shadow:inset 0 -4px 0 var(--copper)}}



/* UST testing */
.ust{background:#fff}
.ust-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:44px;align-items:start}
.postcard{--pc:#F2C230;background:var(--pc);color:#151515;box-shadow:0 18px 40px rgba(22,37,47,.18);transform:rotate(-1.2deg);display:grid;font-family:var(--display);overflow:hidden;max-width:100%}
.pc-top{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:18px 22px 10px;border-bottom:3px solid #151515;margin:0 22px;padding-inline:0}
.pc-attn{font:600 12px/1.2 var(--mono);letter-spacing:.14em;display:flex;align-items:center;gap:10px}
.pc-attn i{width:16px;height:16px;border:3px solid #151515;border-radius:50%;background:#fff;flex:none}
.pc-brand{display:flex;align-items:center;gap:6px}.pc-brand b{font:700 24px/1 var(--display)}.pc-brand em{font:600 7px/1.2 var(--body);letter-spacing:.2em;font-style:normal;border-left:2px solid #151515;padding-left:6px}
.pc-head{font:700 clamp(30px,4.4vw,46px)/.98 var(--display);text-transform:uppercase;padding:14px 22px 10px;letter-spacing:-.005em}
.pc-mid{display:grid;grid-template-columns:1fr auto;gap:16px;padding:0 22px 16px;align-items:start}
.pc-mid p{font:400 15px/1.45 var(--body)}
.pc-rules{background:#fff;border:2px solid #151515;padding:8px 10px;display:grid;gap:3px;font:500 11px/1.2 var(--mono);white-space:nowrap}
.pc-cred{display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:center;padding:6px 22px 18px}
.pc-badge{background:#fff;border:3px solid #151515;padding:6px 12px;text-align:center;display:grid;gap:2px}
.pc-badge small{font:600 9px/1 var(--mono);letter-spacing:.2em}.pc-badge strong{font:700 20px/1 var(--display);letter-spacing:.02em}
.pc-cred p{font:400 13px/1.4 var(--body)}
.pc-foot{background:#151515;color:#fff;display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;padding:16px 22px}
.pc-foot b{display:block;font:700 22px/1 var(--display);letter-spacing:.04em}.pc-foot small{font:500 10px/1.6 var(--mono);letter-spacing:.14em;color:var(--pc)}
.pc-foot span{font:700 clamp(28px,4vw,40px)/1 var(--display);color:var(--pc)}
@media (max-width:560px){.pc-mid,.pc-cred{grid-template-columns:1fr}.postcard{transform:none}}
@media (prefers-reduced-motion:reduce){.postcard{transform:none}}
.ust-side{display:grid;gap:18px}
.ust-side h3{font-size:24px;font-weight:600}
.checks{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.checks li{display:grid;grid-template-columns:22px 1fr;gap:8px;font-size:16px}
.checks li::before{content:"";width:14px;height:8px;border-left:3px solid var(--copper);border-bottom:3px solid var(--copper);transform:rotate(-45deg);margin-top:6px}
.cta-box{background:var(--copper-soft);border:1px solid #EBD3C0;padding:24px;display:grid;gap:10px}
.cta-title{font:700 24px/1.1 var(--display);color:var(--steel)}
.cta-btns{display:flex;flex-wrap:wrap;gap:10px;margin-top:4px}
.cta-btns .btn{cursor:pointer;font-family:var(--body)}
@media (max-width:860px){.ust-grid{grid-template-columns:1fr}}
/* request dialog */
dialog#req{border:0;padding:0;width:min(680px,calc(100vw - 24px));max-height:calc(100dvh - 24px);background:#fff;color:var(--ink);box-shadow:0 30px 80px rgba(0,0,0,.35)}
dialog#req::backdrop{background:rgba(14,36,49,.6)}
#req-form{padding:26px;display:grid;gap:14px}
.dlg-head{display:flex;justify-content:space-between;align-items:center;gap:12px}
.dlg-head h3{font-size:26px;font-weight:700}
.dlg-x{font-size:28px;line-height:1;background:none;border:0;cursor:pointer;color:var(--muted);padding:4px 8px}
#req-body{display:grid;gap:14px}
.seg{border:0;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:8px 18px}
.seg legend{font:600 12px/1 var(--body);letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
.seg label{display:flex;gap:8px;align-items:center;font-weight:500}
.grp{font:600 12px/1 var(--body);letter-spacing:.12em;text-transform:uppercase;color:var(--copper);margin-top:6px}
.f2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.f2.tight{gap:10px}
.f2 label,#req-body > label.full{display:grid;gap:5px;font-size:13px;font-weight:500;color:var(--muted);min-width:0}
.f2 .full{grid-column:1/-1}
#req input:not([type=radio]):not([type=checkbox]),#req select,#req textarea{font:400 16px/1.3 var(--body);padding:10px 11px;border:1px solid #C5D0D6;border-radius:3px;width:100%;color:var(--ink);background:#fff}
#req textarea{resize:vertical}
#req [aria-invalid="true"]{border-color:#B3261E!important;background:#FDF3F2!important}
.chk{display:flex;gap:8px;align-items:center;font-weight:500}
.err{color:#B3261E;font-weight:600;font-size:14px}
.dlg-foot{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
#r-submit{cursor:pointer;font-family:var(--body)}
@media (max-width:560px){.f2{grid-template-columns:1fr}#req-form{padding:20px}}

/* forms */
.forms{background:#fff}
.forms-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:28px;align-items:start}
.form-stack{display:grid;gap:20px}
.form-card{display:grid;grid-template-columns:130px 1fr;gap:24px;border:1px solid var(--line);padding:24px;background:#fff}
.form-card svg{width:100%;height:auto;max-width:100%;filter:drop-shadow(0 6px 12px rgba(22,37,47,.12))}
.fbody{display:grid;gap:10px;align-content:start}
.ftag{font:600 12px/1 var(--body);letter-spacing:.1em;text-transform:uppercase;color:var(--cuso4)}
.fbody h3{font-size:24px;font-weight:600}
.fbody p{color:var(--muted);font-size:15px}
.official{background:var(--tint);padding:26px;display:grid;gap:12px}
.official h3{font-size:22px;font-weight:600}
.official > p{color:var(--muted);font-size:15px}
.official ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.official li{display:flex;flex-wrap:wrap;gap:6px 14px;align-items:baseline;border-bottom:1px solid var(--line);padding-bottom:10px}
.official li b{width:90px;color:var(--steel)}
.official li a{color:var(--copper);font-weight:600;font-size:15px}
@media (max-width:860px){.forms-grid{grid-template-columns:1fr}}
@media (max-width:480px){.form-card{grid-template-columns:1fr}.form-card svg{max-width:120px}}

/* marquee */
.clients{padding-block:48px;background:#fff;border-top:1px solid var(--line)}
.clients .label{text-align:center;margin-bottom:26px}
.marquee{overflow:hidden;mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);-webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.track{display:flex;width:max-content;animation:roll 50s linear infinite}
.marquee:hover .track{animation-play-state:paused}
.track span{font:600 23px/1 var(--display);color:var(--steel-2);padding:0 38px;white-space:nowrap;display:flex;align-items:center;gap:38px}
.track span::after{content:"";width:7px;height:7px;background:var(--copper);transform:rotate(45deg)}
@keyframes roll{to{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){.track{animation:none;flex-wrap:wrap;width:auto;justify-content:center;row-gap:16px}.marquee{mask-image:none;-webkit-mask-image:none}}

/* contact */
.contact{background:var(--copper-soft)}
.contact .wrap{display:grid;grid-template-columns:1.2fr 1fr;gap:48px;align-items:center}
.contact h2{font-size:clamp(30px,4.4vw,46px);font-weight:700}
.contact p{color:var(--muted);margin-top:14px;max-width:54ch;font-size:17px}
.cbox{background:#fff;padding:28px;display:grid;gap:18px;box-shadow:0 10px 30px rgba(22,37,47,.08)}
.cline{display:grid;gap:4px}
.cline span{font:600 11px/1 var(--body);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.cline b{font:500 20px/1.35 var(--mono);color:var(--steel);user-select:all;overflow-wrap:anywhere}
.cfacts{list-style:none;margin:28px 0 0;padding:0;display:grid;gap:10px;color:var(--steel);font-size:15px}
.cfacts b{font-weight:600}
.copy-btn{justify-self:start;font:600 13px/1 var(--body);background:#fff;border:1px solid var(--line);color:var(--steel);padding:9px 14px;cursor:pointer;border-radius:3px}
@media (max-width:760px){.contact .wrap{grid-template-columns:1fr}}

footer{background:var(--steel);color:var(--on-steel-muted);font-size:14px}
footer .wrap{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:32px;padding-block:44px}
footer .logo{width:170px;color:#fff}
footer h4{margin:0 0 10px;font:600 12px/1 var(--body);letter-spacing:.14em;text-transform:uppercase;color:#fff}
footer a{text-decoration:none}
footer a:hover{color:#fff}
footer .links{display:grid;gap:6px}
footer .legal{grid-column:1/-1;border-top:1px solid var(--steel-2);padding-top:18px;font-size:13px}
@media (max-width:760px){footer .wrap{grid-template-columns:1fr}}
nav a[aria-current="page"]{color:var(--copper)}
.page-pad{padding-top:56px}
.privacy{max-width:760px}
.privacy h1{font-size:clamp(32px,4vw,44px);margin-bottom:18px}
.privacy p,.privacy li{color:var(--muted);font-size:17px;margin-bottom:12px}